Auger-bit



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AD MS AUGER' BIT; No. 533,855. Patented Feb. 12, 1895.

22 ,INVENTOR axaaml,

$267M BY ATTORNEY 9m LU e e Y W e e h s 3 RM Mm A D R FB m A Nd o M 0 INVENTOR WITNESSES:

ATTORNEY NO'MM L I 3Sheet sSheet 3. I A; L. ADAMS;

AUGER BIT.

No. 533,855. Patented Feb. 12, 1895.

INVENTOR- WITNESSES:

2o 17 BY I ATTORNEY To all whom it may concern.-

UNIT D} STATES .ZPATENT OFF-I E.

ABRAHAM L.- ADAMS, OF BRIDGEPORT, CONNECTICUT.

AUGER- BIT."

SPECIFICATION'forming part of Letters Patent No. 533,855, dated February 12, 1895. Application filed February 24, 1894. Serial No. 501,396. (No model.)

l 3e it known that I, ABRAHAM. 1.. ADAMS, a citizen of the United States, residing at Bridgeport, inthe county of Fairfield and State of Connecticut, have invented certain new and useful Improvements in AugerBits; and I do hereby declare the following to bea full,

clear, and exact description of the invention; such as will enable others skilled in theart to which it appertains to make and use the same. o I

My invention relates to anger bits but more especially has reference to that class of such devices which employ scoring rings in the place of a center boring point.

The object of my present invention is to provide abit which shall be capable of boring out a series of concentric recesses ,or annular. spaces which may be inlaid with any suitable ornamental parts that have been previously cut out, and to afford means for discharging a rose or an annulusafter the same has been cut out for inlaying purposes. In the accompanying drawings, Figure 1,

is an elevation of myimprovement; Fig. 2, a

bottom view; Fig. 3, a section at'the line a, a, of Fig. 2; Fig. 4, a section at the line b, b, of Fig. 1; Fig. 5, a detailed perspective of my improved bit; Fig. 6, a section at the line 00, cc, of Fig. 5; Fig. 7, a plan of a block showing the concentric boringefiected by my bit; Fig. 8, a section at the line y, y, of Fig. 7; Fig. 9, a detailed perspective showing the concentrically bored'block and a rose and an annulus to be inlaid therein in detached condition, and Fig. 10, a view similar toFig. 8 but showing the concentrically bored portions of the block inlaid with ornamental parts.

Similar numbers of reference denote like parts in the several figures of the drawings.

1 is theshank of the bit and 2 the head thereof.

' rings to each other and to the head of the bit.

Referring to Fig. 3, 3, 4c, 5, are the scoring rings which are arranged concentrically, the bottoms of the rings being secured to each other and to the head 2 by means of screws These rings are of different diameters as shown, and within these rings are secured in I any ordinary mannercutters 7, 8, 9, as shown at Figs. 2, 5, and 6.

. 10, 11, 12, are gates cut through the bottoms of the cups, that is to say through what would be called the roofs of the rings, for the purpose of affording a discharge for the chips during-the boring.

' 13, 14, 15, are pins which depend from the roofs of the rings, said pins being capable of a free vertical movement and provided with heads to prevent the dropping out of such.

pins from the rings.

In cutting out a rose or an annulus by means of the lower edges of the scoring rings,

it frequently happens that the rose or annulus sticks in the ring but by depressing these pins the parts thus cut out maybe readily ejected from the rings. Any desired number of these pins may be employed at any location in the roofs of the rings. These ejector pins are of especial advantage when bits of this character are run by power, since, without stoppin g the running of the bit, such pins may be depressed to throw out the rose or ann ulus, and heretofore it has been the practice to stop the revolution of the bit and to drive out the rose or annulus by tapping the same with a pin inserted through the roof of the ring.

When my improvement is provided with a cutter in each ring as shown in Figs. 2 and 5, I am enabled to bore out a block 16 in the manner shown at'Fig. 10, the middle cutter giving an ornamental appearance to the annular wall 17, whilethe inner and outer cutters bore out the recessed portions 18, 19, within which an ornamental rose 20 and ring 21 maybe inlaid. As a rule, however, the

middle cutter is dispensed with and the block bored as shown at Fig. 8,'the ornamental rose and ring being inlaid in the manner as above set forth. 1

In Fig. 9 I have shown the block as it appears when bored by the bit shown at Fig. 6,

with a plain ring and rose detached therefrom but occupying the relative position for being inlaid within the block.

As the rose or annulus maybe cutout from woods different in color and grain fromthe wood from which the block: is composed it too prod need.

In utilizing bits of this description considerable care must be exercised in order to prop erly locate the boring and at the same time to perform the same in a Workmanlike manner, and I have therefore provided a stand or support for the bit very simple in its construction and affording great facility in using the bit. This stand comprises a ring 22 from which rises bracket arms 23 which latter support at their top an interiorly threaded socket 24. Within this socket .is run an exteriorly threaded screw 28 which latter is hollow throughout its length and is provided with one or more pins 25 projecting laterally therefrom whereby such screw may be readily turned. The shank of the bit isinserted up through this screw, and around the shank above the screw is a collar 26 provided with a set screw 27 extending through said collar and bearing against said shank. In practice the ring 22 is placed upon the block so that the bit will be properly located as to its boring field. By adjusting the collar 26 along the spindle, the depth to which the bit can bore is thereby determined, for as the shank sinks during the boring the said collar will strike against the top of the screw and thereby prevent the bit from cutting any deeper. Should a depth to a slighter distance be desired in the boring, this may be efiected by simply adjusting the screw by means of the pins 25.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In an anger bit, the combination with the shank and its head, of an annular scoring cutterconsisting of an integral cup having its edge sharpened and its bottom connected to the head by securing devices passing through said bottom, and a second annular cutter of smaller diameter consisting of an integral cup with sharpened edge having its bottom attached concentrically within the bottom of the first mentioned cup, both cups having cutting blades and openings for the passage of chips, all substantially as described 2. A multiple cutter bit having a boring head with a plurality of annular cutters attached thereto, anda series of pins extending through holes in the head and into the annular spaces between the said cutters, the pins being independent of each other, so that pieces between the cutters may be separately ejected while the bit is in operation, substantially as described.

3. The guiding stand having abase to rest on the plane face of the Work surrounding the tool, an arched bracket attached to said base, said bracket having a screw threaded passage, a threaded sleeve in said passage, said sleeve having a smooth central perforation, the bit shank passing through said perforation, and an adjustable stop on the shank above the sleeve, all combined substantially as described so that the sleeve by engagement with the stop on the bit may retard and control the feed thereof. v

In testimony whereof I affix my signature in presence of two Witnesses.

ABRAHAM L. ADAMS.

Witnesses:

F. W. SMITH, J r., M. T. LONGDEN. 

